The START/STOP footswitch jack is provided for a momentary normally open footswitch that connects the jack's tip to its sleeve (ground). While in stop, the footswitch will function like the play button and start a part or song from the beginning. While in play, the footswitch acts like the stop button, and stops playing.
Holding RECORD and pressing LENGTH causes the following display:
This shows the amount of memory that has not been used. Note that some operations may not be possible even though it seems that there is still a small amount of memory available. This is due to the fact that the MMT-8 requires enough memory to duplicate a part before it can be recorded on, or length changed, or offset, etc. If a large part is attempted to be altered when there is not enough memory to complete the operation, the display will indicate that there is not enough memory available to complete the operation:
To clear all of the MMT-8's memory and reinitialise all of its variables, turn power off, press and hold ERASE, PAGE UP, and PAGE DOWN, and turn on the power while holding these buttons down for 3 seconds.